Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* crypto/evp/e_des3.c */ |
| 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * This package is an SSL implementation written |
| 6 | * by Eric Young (eay@cryptsoft.com). |
| 7 | * The implementation was written so as to conform with Netscapes SSL. |
| 8 | * |
| 9 | * This library is free for commercial and non-commercial use as long as |
| 10 | * the following conditions are aheared to. The following conditions |
| 11 | * apply to all code found in this distribution, be it the RC4, RSA, |
| 12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| 13 | * included with this distribution is covered by the same copyright terms |
| 14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| 15 | * |
| 16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
| 17 | * the code are not to be removed. |
| 18 | * If this package is used in a product, Eric Young should be given attribution |
| 19 | * as the author of the parts of the library used. |
| 20 | * This can be in the form of a textual message at program startup or |
| 21 | * in documentation (online or textual) provided with the package. |
| 22 | * |
| 23 | * Redistribution and use in source and binary forms, with or without |
| 24 | * modification, are permitted provided that the following conditions |
| 25 | * are met: |
| 26 | * 1. Redistributions of source code must retain the copyright |
| 27 | * notice, this list of conditions and the following disclaimer. |
| 28 | * 2. Redistributions in binary form must reproduce the above copyright |
| 29 | * notice, this list of conditions and the following disclaimer in the |
| 30 | * documentation and/or other materials provided with the distribution. |
| 31 | * 3. All advertising materials mentioning features or use of this software |
| 32 | * must display the following acknowledgement: |
| 33 | * "This product includes cryptographic software written by |
| 34 | * Eric Young (eay@cryptsoft.com)" |
| 35 | * The word 'cryptographic' can be left out if the rouines from the library |
| 36 | * being used are not cryptographic related :-). |
| 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
| 38 | * the apps directory (application code) you must include an acknowledgement: |
| 39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| 40 | * |
| 41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| 42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 51 | * SUCH DAMAGE. |
| 52 | * |
| 53 | * The licence and distribution terms for any publically available version or |
| 54 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
| 55 | * copied and put under another distribution licence |
| 56 | * [including the GNU Public Licence.] |
| 57 | */ |
| 58 | |
| 59 | #include <stdio.h> |
| 60 | #include "cryptlib.h" |
| 61 | #ifndef OPENSSL_NO_DES |
| 62 | #include <openssl/evp.h> |
| 63 | #include <openssl/objects.h> |
| 64 | #include "evp_locl.h" |
| 65 | #include <openssl/des.h> |
| 66 | #include <openssl/rand.h> |
| 67 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 68 | static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 69 | const unsigned char *iv,int enc); |
| 70 | |
| 71 | static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 72 | const unsigned char *iv,int enc); |
| 73 | |
| 74 | static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); |
| 75 | |
| 76 | typedef struct |
| 77 | { |
| 78 | DES_key_schedule ks1;/* key schedule */ |
| 79 | DES_key_schedule ks2;/* key schedule (for ede) */ |
| 80 | DES_key_schedule ks3;/* key schedule (for ede3) */ |
| 81 | } DES_EDE_KEY; |
| 82 | |
| 83 | #define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data) |
| 84 | |
| 85 | /* Because of various casts and different args can't use IMPLEMENT_BLOCK_CIPHER */ |
| 86 | |
| 87 | static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 88 | const unsigned char *in, size_t inl) |
| 89 | { |
| 90 | BLOCK_CIPHER_ecb_loop() |
| 91 | DES_ecb3_encrypt((const_DES_cblock *)(in + i), |
| 92 | (DES_cblock *)(out + i), |
| 93 | &data(ctx)->ks1, &data(ctx)->ks2, |
| 94 | &data(ctx)->ks3, |
| 95 | ctx->encrypt); |
| 96 | return 1; |
| 97 | } |
| 98 | |
| 99 | static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 100 | const unsigned char *in, size_t inl) |
| 101 | { |
| 102 | if (inl>=EVP_MAXCHUNK) |
| 103 | { |
| 104 | DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, |
| 105 | &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, |
| 106 | (DES_cblock *)ctx->iv, &ctx->num); |
| 107 | inl-=EVP_MAXCHUNK; |
| 108 | in +=EVP_MAXCHUNK; |
| 109 | out+=EVP_MAXCHUNK; |
| 110 | } |
| 111 | if (inl) |
| 112 | DES_ede3_ofb64_encrypt(in, out, (long)inl, |
| 113 | &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, |
| 114 | (DES_cblock *)ctx->iv, &ctx->num); |
| 115 | |
| 116 | return 1; |
| 117 | } |
| 118 | |
| 119 | static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 120 | const unsigned char *in, size_t inl) |
| 121 | { |
| 122 | #ifdef KSSL_DEBUG |
| 123 | { |
| 124 | int i; |
| 125 | char *cp; |
| 126 | printf("des_ede_cbc_cipher(ctx=%lx, buflen=%d)\n", ctx, ctx->buf_len); |
| 127 | printf("\t iv= "); |
| 128 | for(i=0;i<8;i++) |
| 129 | printf("%02X",ctx->iv[i]); |
| 130 | printf("\n"); |
| 131 | } |
| 132 | #endif /* KSSL_DEBUG */ |
| 133 | if (inl>=EVP_MAXCHUNK) |
| 134 | { |
| 135 | DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, |
| 136 | &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, |
| 137 | (DES_cblock *)ctx->iv, ctx->encrypt); |
| 138 | inl-=EVP_MAXCHUNK; |
| 139 | in +=EVP_MAXCHUNK; |
| 140 | out+=EVP_MAXCHUNK; |
| 141 | } |
| 142 | if (inl) |
| 143 | DES_ede3_cbc_encrypt(in, out, (long)inl, |
| 144 | &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, |
| 145 | (DES_cblock *)ctx->iv, ctx->encrypt); |
| 146 | return 1; |
| 147 | } |
| 148 | |
| 149 | static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 150 | const unsigned char *in, size_t inl) |
| 151 | { |
| 152 | if (inl>=EVP_MAXCHUNK) |
| 153 | { |
| 154 | DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, |
| 155 | &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, |
| 156 | (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); |
| 157 | inl-=EVP_MAXCHUNK; |
| 158 | in +=EVP_MAXCHUNK; |
| 159 | out+=EVP_MAXCHUNK; |
| 160 | } |
| 161 | if (inl) |
| 162 | DES_ede3_cfb64_encrypt(in, out, (long)inl, |
| 163 | &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, |
| 164 | (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); |
| 165 | return 1; |
| 166 | } |
| 167 | |
| 168 | /* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right |
| 169 | way, so wrap it here */ |
| 170 | static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 171 | const unsigned char *in, size_t inl) |
| 172 | { |
| 173 | size_t n; |
| 174 | unsigned char c[1],d[1]; |
| 175 | |
| 176 | for(n=0 ; n < inl ; ++n) |
| 177 | { |
| 178 | c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0; |
| 179 | DES_ede3_cfb_encrypt(c,d,1,1, |
| 180 | &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3, |
| 181 | (DES_cblock *)ctx->iv,ctx->encrypt); |
| 182 | out[n/8]=(out[n/8]&~(0x80 >> (unsigned int)(n%8))) | |
| 183 | ((d[0]&0x80) >> (unsigned int)(n%8)); |
| 184 | } |
| 185 | |
| 186 | return 1; |
| 187 | } |
| 188 | |
| 189 | static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 190 | const unsigned char *in, size_t inl) |
| 191 | { |
| 192 | while (inl>=EVP_MAXCHUNK) |
| 193 | { |
| 194 | DES_ede3_cfb_encrypt(in,out,8,(long)EVP_MAXCHUNK, |
| 195 | &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3, |
| 196 | (DES_cblock *)ctx->iv,ctx->encrypt); |
| 197 | inl-=EVP_MAXCHUNK; |
| 198 | in +=EVP_MAXCHUNK; |
| 199 | out+=EVP_MAXCHUNK; |
| 200 | } |
| 201 | if (inl) |
| 202 | DES_ede3_cfb_encrypt(in,out,8,(long)inl, |
| 203 | &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3, |
| 204 | (DES_cblock *)ctx->iv,ctx->encrypt); |
| 205 | return 1; |
| 206 | } |
| 207 | |
| 208 | BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64, |
| 209 | EVP_CIPH_RAND_KEY, des_ede_init_key, NULL, |
| 210 | EVP_CIPHER_set_asn1_iv, |
| 211 | EVP_CIPHER_get_asn1_iv, |
| 212 | des3_ctrl) |
| 213 | |
| 214 | #define des_ede3_cfb64_cipher des_ede_cfb64_cipher |
| 215 | #define des_ede3_ofb_cipher des_ede_ofb_cipher |
| 216 | #define des_ede3_cbc_cipher des_ede_cbc_cipher |
| 217 | #define des_ede3_ecb_cipher des_ede_ecb_cipher |
| 218 | |
| 219 | BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64, |
| 220 | EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL, |
| 221 | EVP_CIPHER_set_asn1_iv, |
| 222 | EVP_CIPHER_get_asn1_iv, |
| 223 | des3_ctrl) |
| 224 | |
| 225 | BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,1, |
| 226 | EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL, |
| 227 | EVP_CIPHER_set_asn1_iv, |
| 228 | EVP_CIPHER_get_asn1_iv, |
| 229 | des3_ctrl) |
| 230 | |
| 231 | BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,8, |
| 232 | EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL, |
| 233 | EVP_CIPHER_set_asn1_iv, |
| 234 | EVP_CIPHER_get_asn1_iv, |
| 235 | des3_ctrl) |
| 236 | |
| 237 | static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 238 | const unsigned char *iv, int enc) |
| 239 | { |
| 240 | DES_cblock *deskey = (DES_cblock *)key; |
| 241 | #ifdef EVP_CHECK_DES_KEY |
| 242 | if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1) |
| 243 | !! DES_set_key_checked(&deskey[1],&data(ctx)->ks2)) |
| 244 | return 0; |
| 245 | #else |
| 246 | DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1); |
| 247 | DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2); |
| 248 | #endif |
| 249 | memcpy(&data(ctx)->ks3,&data(ctx)->ks1, |
| 250 | sizeof(data(ctx)->ks1)); |
| 251 | return 1; |
| 252 | } |
| 253 | |
| 254 | static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 255 | const unsigned char *iv, int enc) |
| 256 | { |
| 257 | DES_cblock *deskey = (DES_cblock *)key; |
| 258 | #ifdef KSSL_DEBUG |
| 259 | { |
| 260 | int i; |
| 261 | printf("des_ede3_init_key(ctx=%lx)\n", ctx); |
| 262 | printf("\tKEY= "); |
| 263 | for(i=0;i<24;i++) printf("%02X",key[i]); printf("\n"); |
| 264 | printf("\t IV= "); |
| 265 | for(i=0;i<8;i++) printf("%02X",iv[i]); printf("\n"); |
| 266 | } |
| 267 | #endif /* KSSL_DEBUG */ |
| 268 | |
| 269 | #ifdef EVP_CHECK_DES_KEY |
| 270 | if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1) |
| 271 | || DES_set_key_checked(&deskey[1],&data(ctx)->ks2) |
| 272 | || DES_set_key_checked(&deskey[2],&data(ctx)->ks3)) |
| 273 | return 0; |
| 274 | #else |
| 275 | DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1); |
| 276 | DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2); |
| 277 | DES_set_key_unchecked(&deskey[2],&data(ctx)->ks3); |
| 278 | #endif |
| 279 | return 1; |
| 280 | } |
| 281 | |
| 282 | static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) |
| 283 | { |
| 284 | |
| 285 | DES_cblock *deskey = ptr; |
| 286 | |
| 287 | switch(type) |
| 288 | { |
| 289 | case EVP_CTRL_RAND_KEY: |
| 290 | if (RAND_bytes(ptr, c->key_len) <= 0) |
| 291 | return 0; |
| 292 | DES_set_odd_parity(deskey); |
| 293 | if (c->key_len >= 16) |
| 294 | DES_set_odd_parity(deskey + 1); |
| 295 | if (c->key_len >= 24) |
| 296 | DES_set_odd_parity(deskey + 2); |
| 297 | return 1; |
| 298 | |
| 299 | default: |
| 300 | return -1; |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | const EVP_CIPHER *EVP_des_ede(void) |
| 305 | { |
| 306 | return &des_ede_ecb; |
| 307 | } |
| 308 | |
| 309 | const EVP_CIPHER *EVP_des_ede3(void) |
| 310 | { |
| 311 | return &des_ede3_ecb; |
| 312 | } |
| 313 | #endif |